Flow control system for a detention pond
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United States of America Patent
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Jun 9, 2015
Grant Date -
Feb 13, 2014
app pub date -
Oct 18, 2013
filing date -
May 11, 2009
priority date (Note) -
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Abstract
A flow control system of the present invention includes a movable riser slideably engaged with a stationary riser and having a flange. The stationary riser is interfaced to a downstream drainage system. The movable riser is made buoyant by one or more floats such that, as the water level around the flow control system changes, the movable riser follows the changes based upon the buoyancy of the float(s), thereby maintaining the flange at a constant depth. The gap between an upper edge of the flange and the inner perimeter of the stationary riser coupled with an area of the gap defines a flow rate that is constant. Vents couple an inner cavity of the movable riser to air above the fluid, the inner cavity being in communication with the drainage system as well.
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